LF470/LF612
1/10",1/6”,1/4" (2.5,4,6mm )
Field Intelligent Device Series
Electromagnetic Flowmeter
Introduction
The electromagnetic flowmeter uses Faraday’s Law of
electromagnetic induction to measure the process flow.
The device consists of two units: a detector, through
which the fluid to be measured flows and in which
low-level signals proportional to flow rates are obtained;
and a converter, which supplies excitation current to the
detector, and amplifies the signals from the detector and
then processes and converts the signals into the 4–20
mA dc current signal. The LF470 is a small meter size
detector designed to measure a small amount of fluids
containing substances such as chemicals.
LF612
LF470
Figure 2. Electromagnetic Flowmeter
LF470/LF612
The wetted materials for the LF470 are corrosion
resistant ceramic and platinum electrods and are
applicable to almost any kind of fluids. The LF470 is a
lightweight palm-sized detector.Combined with
multi-functional converter LF612 (separate type) and
LF232*1 (separate type) equipped with its patented
Noise-Sentry original noise-suppression circuit and
advanced algorithms. The LF470 is highly resistant to
noise and provides a stable output even for fluids
containing slurries. IR (Infrared) switches enable
parameter setting of the converter without removing the
cover. Flow direction can be set in either way, and its
unique 128 x 128 dot matrix LCD display allows the
LCD to be rotated electronically to be rotated to 90, 180
and 270 degrees without opening the cover
Certification number
Z01207
Specifications
ꢀOverall Specifications
Measurement range in terms of flow velocity:
0–1.0ft/s to 0–32.8ft/s (0–0.3 m/s to 0–10 m/s )
Accuracy: The overall accuracy combined with the
LF612 or LF232 converter is shown in the
following table.
The AF900 hand-held terminal (HART*2 communicator)
can be used to communicate with the flowmeter from a
remote place. PROFIBUS-PA*3 interface is available
as an option.
Flow rate as a
percent of range
Accuracy
1.0-3.3ft/s
(0.3-1.0m/s )
3.3-32.8ft/s
(1.0-10m/s )
50 100
0.8% of FS
0.8% of FS
0.8% of rate
～
50
％
±
±
±
±
*1: Please refer to the document ”TIC-LF232”.
*2: HART protocol (Highway Addressable Remote
Transducer) is a communication protocol for industrial
sensors recommended by the HCF (HARTCommunication
Foundation).
0
0.4% of FS
～
％
Note: The accuracy is measured under standard
operating conditions at Toshiba's calibration facility.
*3: PROFIBUS is the communication protocol for factory
and process automation that the PROFIBUS Organization
recommends. Instead of analog control with a
conventional analog signal (4-20mA), it is the fieldbus
which digitizes all signals. Flowmeters support
PROFIBUS-PA.
Fluid conductivity: 50µS/cm minimum
Fluid temperature:
Pipe connection material Fluid temperature
Stainless steel and other metals
14 to 248 °F
10 120 )
℃
(
－
℃～＋
14 to 140 °F
10 60 )
℃
Polyvinyl chloride
(shock-resistant)
Fluid to be
measured
(
－
℃～＋
Ambient temperature: 14 to 140 °F (–10 to +60 °C )
Structure: IP67
Power supply
Signal cable
Excitation cable
4-20mA dc output
Power consumption:
and pulse output
・When combined with the LF612 converter:
LF470
LF612 or LF232
Detector
approximately 12W (20VA)
Converter
・When combined with the LF232 converter:
Figure 1. Configuration Diagram
approximately 14W (25VA)
TIC-LF470B
TIC-LF470B
Power supply:
Communications output ：
One of the following can be selected:
• 100 to 240Vac, 50/60Hz (std.)
(allowable voltage 80 to 264Vac)
• HART (std.) — Digital signal is superimposed on
4–20mAdc current signal as follows:
Conforms to HART protocol
• 24Vdc (allowable voltage 18 to 36Vdc)
• 110Vdc (allowable voltage 90 to 130Vdc)
Load resistance: 240 to 750Ω
Load capacitance: 0.25µF maximum
Load inductance: 4mH maximum
• PROFIBUS(opt.)
Surge protection:
Arresters are installed in the power supply and a
current signal output circuit to help protect the meter
from lightning and improve personnel safety.
Protocol: PROFIBUS-PA
Baud rate: 31.25kbps
Bus voltage: 9-30VDC
Consumption electric current of bus: less than 16mA
Manufacture Ident-No.: 093BHEX
Standard Ident-No.: 9740HEX
Slave address: 0-126 (Default address is 126)
Profile: Profile Ver.3.01 for Process Control
Devices
Case: Aluminum alloy (equal to IP 67)
Coating: Acrylic resin-baked coating, pearl–gray
colored
Cable connection port:
Cable glands —
Function blocks: AI(Flow)×1 , Totalizer×1
Provided as standard, OD of 11 to 13mm
Material Nylon 66
G (PF) 1/2 male screws
LCD display:
Full dot-matrix 128×128 dot LCD display
(back–light provided)
The data on the LCD inside the converter can rotate
to 90, 180, and 270 degrees by a software, without
rotating the indicator itself. (Combined type only)
Applicable diameter —
0.433 to 0.512 inch (11 to 13mm)
Note: When PROFIBUS option is specified, cable gland size is φ
6～8mm for signal cable, φ11～13mm for power cable
Parameter settings — Parameters can be set as
follows:
Vibration resistance:
No resonance to the following levels of vibration:
• 10 to 150Hz with acceleration of 9.8m/s2
• Vibration of 30Hz with 29.4 m/s2 in 4h in each
direction will not cause any defect to unit.
• IR Switches: Three key switches are provided to
set configuration parameters.
• Digital communication: The AF900 hand-held
terminal or PROFIBUS is needed to set
parameters.
Note: Avoid using the flowmeter in an environment with
constant vibration.
• Zero adjustment: Zero point adjustment can be
Dimensions :
See Figure 5
started by pressing the switch in the converter.
• Damping: 0.5 to 60 seconds (selectable in one
MTBF:
second increments)
Converter: 220,000 hours (25 years) at 77 °F (25 °C)
based on strict military specification
MIL-HDBK-217F
“Field re-verification” Mag-Prover – Toshiba’s
Zero span calibration tool allows unit to be
re-calibrated and verified using an internal software
program. (For more information contact Toshiba
International Corp.)
Detector: 350,000 hours (40 years) at 77 °F (25 °C)
based on strict military specification
MIL-HDBK-217F
Conditions when power fails:
Parameter setting values are stored in non–volatile
memory and the values will be restored when the
power returns to normal condition. The outputs and
display will remain as follows when power fails.
• Current output: 0mAdc
• Digital output: OFF
• LCD display: No display
• PROFIBUS: No communication
3
TIC-LF470B
Installation
ꢀ Dimensions
Unit : inch (mm)
2.20(56)
Unit : inch (mm)
3.39(86)
2.95(75)
1.18(30)
**
*
*
**
1.46(37)
Signal cable
Detector mounting plate
(4mm thick)
2-φ0.24(φ6) hole
Excitation cable
φ0.28(φ7)
φ0.28(φ7)
*2.76(70)
4-φ0.20(φ5) hole
Mounting screws
* This length becomes 78mm if the pipe
connection port thread is Rc(PT)1/2
and Rc(PT)3/4.
Note: 1 inch = 25.4mm
If a mounting plate is needed for the LF470, fix the plate (a)
above to the bottom of the LF470. Depending on which pair of
screw holes used, the mounting angle changes by 90°.
2-M4
(Mou nting screw holes)
Note: 1 inch = 25.4mm
Figure3. LF470 Dimensions
Figure4. LF470 Mounting Board
4 –φ0. 43(φ11)
5.94(151)
0.51(13)
Unit : inch (mm)
0.98(25) 3.23(82)
Attachment
2.91(74)
LCD display
Excitation cable ground
I/電O流ca出bl力e ケgroーuブndルグランド
Gr ound terminal
(M4)
Power supply cable ground
Signal cable ground
Blind screw
IR Swi tc h
Cable ground
Note: 1 inch = 25.4mm
Figure 5. Separate type converter LF612
4
TIC-LF470B
Separate type LF470/LF612 flowmeter
Terminal board
IV wire
5.5 mm2 or more
Thick walled steel conduit
Grounded with 100Ω or less
ground resistance
Power switch
(External double-pole power switch )
[Instrument panel : ordered separately]
Grounded with 100Ω or less
Signal cable
(2-wire shielded hard-rubber
sheathed cable)
ground resistance
Power supply
Current output (4~20mAdc)
or PROFIBUS
Digital output 1
Signal common for DI and DO
Connected detector
Digital output 2
Excitation cable
Digital input
(20~30Vdc)
(3-wire shielded hard-rubber cable)
Power cable
(CVV)
Digital input cable
(CVV-S)
Grounded with 100Ω or less
ground resistance
Figure 6. Separate type LF470/LF612 flowmeters wiring Diagram
Table 1. LF612 Converters Signal Table
Symbol
L1 (＋)
L2 (－)
GND
FG
Description
Cable
Power supply
Power cable (CVV)
Ground (for arrester)
Frame ground
DI
DO1
Digital Input (20～30Vdc)
Digital Output 1
DO2
Digital Output 2
COM
Signal Common for DI, DO1, DO2
I/O cable (CVV-S)
＋
Current Output (4～20mAdc)
or PROFIBUS
－
X
Y
E
A
B
G
Excitation cable
Signal cable
Excitation Output
Signal Input
5
TIC-LF470B
ꢀWiring Precautions
ꢀAbout establishment environment
Do not store or install the flowmeter:
• Where there is direct sunlight.
• Where excessive vibration or mechanical shock
occurs.
(1) Connect the following two cables correctly:
1) signal cable (on the right facing the LF470)
2) excitation cable (on the left facing the LF470)
(2) Do not bend apply excessive force to these cables.
ꢀPiping Precautions
• Where high temperature or high humidity conditions
exist.
(1) Connect the fluid pipe to the pipe connection port
using a joint that matches the Rc (PT) female screw.
Use seal tapes when connecting the pipe to the port
to prevent a fluid leakage. Do not tighten the
connection screw too much.
(2) Design piping so that the detector’s pipe is always
filled with the fluid to be measured, whether the
fluid is flowing or not.
• Where corrosive atmospheres exist.
• Places that can be submerged under water.
• Where there is a sloped floor. To put the flowmeter
temporarily on the floor, place it carefully with
something, such as a block, to support it so that the
flowmeter will not topple over.
(3) The fluid to be measured must be held still in the
pipe when the LF470 is being adjusted. If the fluid
can not be stopped after the LF470 installation,
install a bypass pipe in parallel with the LF470
flowmeter.
In areas like the following, there may be the case that
infrared switches do not function correctly. (If these are
unavoidable, use an appropriate cover.)
(1) Where unit (operation panel) is exposed to direct
sunlight, reflection of light onto window pane and
diffused light reflection.
ꢀMeter size
(2) Where smoke and steam may occur.
To select the meter size:
See Table 3 to 4 and find meter sizes within the
velocity of 0.3 to 32.8 ft/s (0.1 to 10m/s) for a
specified full-scale (measuring range high limit)
flow. Select one that has its full-scale velocity
between 3.0 and 10 ft/s (1 and 3m/s).
Note: Make sure the full-scale flow rate used for the final
planning stage stays within 32.8 ft/s (10m/s) in
terms of flow velocity.
(3) Where exposed to direct snow, ice or mud.
Ordering Information
1. When ordering the LF470 flowmeters, refer to
Tables 4 to 5 (Specification Code).
An entry must be made for each of the columns in
each of these tables.
2. Fluid characteristics:
Table 2. Meter size and Flow Velocity (SI unit)
(1) Type of fluid to be measured and its characteristics
(2) Fluid temperature
Unit:gal/min
Meter size
0.98 ft/s
3 ft/s
10 ft/s
32.8 ft/s
(3) Fluid pressure
(4) Electrical conductivity of the fluid
3. Measuring range
4. I/O function setting
(inch)
1/10”
1/6”
0.02334
0.05975
0.1344
0.07115
0.1821
0.4098
0.2372
0.6071
1.3660
0.7781
1.992
4.482
1/4”
5. Ordering scope:
Flow calibration data: (required or not)
Table 3. Meter size and Flow Velocity(US unit)
6. Other items
Unit:L/min
Specifications other than standard items
Meter size
0.3m/s
1m/s
3m/s
10m/s
(mm)
2.5
4
0.08835
0.2262
0.5088
0.2945
0.7540
1.6967
0.884
2.262
5.090
2.945
7.540
Consult a Toshiba representative before ordering when
choosing materials of the wetted parts such as lining,
electrodes, and grounding rings.
.
6
16.967
6
TIC-LF470B
Table 4. Specification Code ( LF470 Detector )
Model
Specification Code
Description
1 2
L F 4
3
4
7
5
0
6
7
8
9 10 11 12 13 14
LF470 Flowmeter
Meter size
2
4
6
1/10" (2.5 mm )
1/6" (4 mm )
1/4" (6 mm )
Converter ( Separate type ) combined
LF612
LF232 (Note 1)
D
E
Pipe connection port (adapter)
Rc (PT) 1/4 female screw (standard)
Rc (PT) 1/8 female screw
Rc (PT) 3/4 female screw
Rc (PT) 1/2 female screw
NPT1/4 female screw
A
B
C
D
E
F
NPT3/8 female screw
G
NPT1/8 female screw
Pipe connection material
316 stainless steel (standard)
Ti (titanium)
Polyvinyl chloride (shock-resistance)+
Ta (Tantalum) for grounding plate
Polyvinyl chloride (shock-resistance)+
Pt-Ir for grounding plate
Hastelloy C (Equivalent)
Packing used between main body and pipe
connection adapter
A
D
E
F
H
C
D
G
Acid-resistant ceramic
Alkali-resistant ceramic
Ammonia-resistance
Mounting
A
B
Not provided
Provided, 304 stainless steel
Flow and calibration velocity range
1.0 to 32.8 ft/s (standard range calibration)
1.0 to 32.8 ft/s (specified range calibration)
Cable length
A
B
A
1
5m (cable dia.7mm)
10m (cable dia.7mm)
2
15m (cable dia.7mm)
3
20m (cable dia.7mm)
4
25m (cable dia.7mm)
5
30m (cable dia.7mm)
B
5m or more
(extension dia. 12mm+Scotch cast connection)
Coating
A
Z
Phthalic acid resin coating pearl-gray colored (standard)
Other
Note 1: Please refer to document number “TIC-LF232” about converter LF232.
7
TIC-LF470B
Table 5. Specification Code for converters
Model
Specification Code
Contents
LF612
type
1 2 3 4 5 6 7 8 9 1011121314
L F 6 1
2
Electromagnetic flowmeter converter
Separate (Remote) type
Purpose
Standard
Shape
Separate type with case
ꢁ
ꢁ
ꢁ
A
B
Converter mounting fitting
A
C
E
None
ꢂ
ꢁ
ꢂ
Panel, Accessory for wall mounting (BNP material: SUS304)
Accessory for pipe installation (BNP material: SUS304)
Digital input/output
1
2
Digital output points 1 (DO1)
ꢁ
ꢂ
Digital output points 2 (DO1+DO2) +Digital input point 1 (DI)
Current output and Communication function
Current output + HART communication
PROFIBUS communication (Current output is not usable)
Power supply
1
2
ꢁ
ꢂ
1
2
3
100Vac-240Vac, 50/60Hz
24Vdc
110Vdc
ꢁ
ꢂ
ꢂ
Instruction manual
E
English
ꢁ
Code explanation:
ꢁ: Standard ꢂ: Option
Specifications are subject to change without notice.
Printed in Japan 2008-5 (TDOC)
© TOSHIBA Corporation 2008
All Rights Reserved.
ISO9001 and ISO14001 are certified.
Misuse of this product can result in damage to property or human injury.
Read related manuals carefully before using this product.
TIC-LF470B
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